<template>
  <div class="app-container">
    讲师列表
    <!--查询表单-->
    <el-card class="operate-container" shadow="never">
      <el-form :inline="true" class="demo-form-inline">
        <el-form-item label="名称">
          <el-input v-model="searchObj.name" placeholder="讲师名" />
        </el-form-item>

        <el-form-item label="头衔">
          <el-select v-model="searchObj.level" clearable placeholder="头衔">
            <el-option value="1" label="高级讲师"/>
            <el-option value="0" label="首席讲师"/>
          </el-select>
        </el-form-item>

        <el-form-item label="入驻时间">
          <el-date-picker
            v-model="searchObj.joinDateBegin"
            placeholder="开始时间"
            value-format="yyyy-MM-dd" />
        </el-form-item>
        <el-form-item label="-">
          <el-date-picker
            v-model="searchObj.joinDateEnd"
            placeholder="结束时间"
            value-format="yyyy-MM-dd" />
        </el-form-item>

        <el-button type="primary" icon="el-icon-search" @click="fetchData()">查询</el-button>
        <el-button type="default" @click="resetData()">清空</el-button>
      </el-form>
    </el-card>
    <!-- 工具按钮 -->
    <el-card class="operate-container" shadow="never">
      <i class="el-icon-tickets" style="margin-top: 5px"></i>
      <span style="margin-top: 5px">数据列表</span>
      <el-button class="btn-add" @click="add()" style="margin-left: 10px;">添加</el-button>
      <el-button class="btn-add" @click="batchRemove()" >批量删除</el-button>
    </el-card>

    <!-- 表格 -->
    <el-table
      :data="list"
      border
      stripe
      @selection-change="handleSelectionChange">
      <el-table-column type="selection"/>
      <el-table-column
        label="#"
        width="50">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="name" label="名称" width="80" />
      <el-table-column label="头衔" width="90">
        <template slot-scope="scope">
          <el-tag v-if="scope.row.level === 1" type="success" size="mini">高级讲师</el-tag>
          <el-tag v-if="scope.row.level === 0" size="mini">首席讲师</el-tag>
        </template>
      </el-table-column>
      <el-table-column prop="intro" label="简介" />
      <el-table-column prop="sort" label="排序" width="60" />
      <el-table-column prop="joinDate" label="入驻时间" width="160" />
      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <el-button type="text" size="mini" @click="removeById(scope.row.id)">删除</el-button>
          <router-link :to="'/vod/teacher/edit/'+scope.row.id">
            <el-button type="text" size="mini">修改</el-button>
          </router-link>
        </template>
      </el-table-column>
    </el-table>
    <!-- 分页组件 -->
    <el-pagination
      :current-page="page"
      :total="total"
      :page-size="limit"
      :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
      style="padding: 30px 0; text-align: center;"
      layout="total, sizes, prev, pager, next, jumper"
      @size-change="changePageSize"
      @current-change="changeCurrentPage"
    />
  </div>
</template>

<script>
//引入定义接口的js
import teacherApi from '@/api/vod/teacher'
export default{
    data(){ //初始值
      return{
        list: [], // 讲师列表
        total: 0, // 总记录数
        page: 1, // 页码
        limit: 10, // 每页记录数
        searchObj: {}, // 查询条件
        multipleSelection: []// 批量删除选中的记录列表
      }
    },
  created() {//页面渲染之前执行
    this.fetchData()
  },
  methods:{//具体方法
    //批量删除
    batchRemove(){
      //判断非空
      if(this.multipleSelection.length===0){
        this.$message.warning('请选择要删除的记录！')
        return
      }
      this.$confirm('此操作将删除该讲师信息, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        var idList=[]
        //[1,2,3]
        //遍历数组
        for (let i = 0; i < this.multipleSelection.length; i++) {
          var obj=this.multipleSelection[i]
          var id=obj.id
          //放到数组中
          idList.push(id)
        }
        //调用接口删除
        teacherApi.batchRemove(idList)
          .then(response=>{
            //提示
            this.$message({
              type: 'success',
              message: '删除成功!'
            });
            //刷新页面
            this.fetchData()
          })
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        });
      });
    },
    //复选框发生变化，调用该方法，选中复选框行内容传递
    handleSelectionChange(selection){
      this.multipleSelection=selection
      console.log(this.multipleSelection)
    },
    //跳转到添加的表单页面
    add(){
      this.$router.push({path:'/vod/teacher/create'})
    },
    fetchData() {
      //ajax
      teacherApi.pageList(this.page,this.limit,this.searchObj)
      .then(response=>{
        this.list=response.data.records
        this.total=response.data.total

      })
    },
    //改变每页显示记录数
    changePageSize(size){
      this.limit=size
      this.fetchData()
    },
    //改变页码数
    changeCurrentPage(page){
      this.page=page
      this.fetchData()
    },
    //清空
    resetData(){
      this.searchObj={}
      this.fetchData()
    },
    //讲师删除
    removeById(id){
      this.$confirm('此操作将删除该讲师信息, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        teacherApi.removeTeacherId(id)
          .then(response=>{
            //提示
            this.$message({
              type: 'success',
              message: '删除成功!'
            });
            //刷新页面
            this.fetchData()
          })
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        });
      });
    }
  }
}
</script>
